Music-leaf turner.



No. 774,521. PATENTED NOV. 8, 1904.

' N. P. JENSEN.

MUSIC LEAF TURNBR. v APPLICATION FILED JULY 14. 1904.

no MODE-L. I ZSHEETS-SHEET 1.

INVENTORI fl ZeZJ' PZ7ZZ Jzwezz ATTORNEYS WITNESSES."

No. 774,521. PATENTED NOV. 8, 1904.

N. P. JENSEN. MUSIC LEAF TURNER.

APPLICATION FILED JULY 14. 1904. N0 MODEL. 2 SHEETS-SHEET 2. W 11 3 4/ i... Q

1 III nu VJIIIIIIIIIIIIIII/'Illllllllllllll urn/"annual WITNESSES: INVENTOR JQE Z; .Z JZZZ Jvasem ATTORNEYS UNrTED STATES Patented November 8, 1904.

PATENT Grricn,

MUSIC-LEAF TURNER.

SPECIFICATION forming part of Letters Patent No. 774,521, dated November 8, 1904.

Application filed July 14, 1904. Serial No- 2l6,494. (No model.)

To ctZZ whom it may concern.-

Be it known that I, NInLs PIHL JENSEN, a

citizen of the United States, and a resident of- Ephraim, in the county of Sanpete and State of Utah, have invented a new and Improved Music-Leaf Turner, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved music-leaf turner for use on pianos, organs, music-racks, and the like and arranged to permit of conveniently turning the leaves successively over in either direction to permit of operating the device either by hand or by foot, and in the latter case to render the device especially serviceable for use on portable music-racks such as are used by band-musicians.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views. I

Figure 1 is afperspective view of the. improvement as applied to a portable music-rack. Fig. 2 is an enlarged plan view of the improvement, part of the casing-cover being broken out. Fig. 3 is a transverse section of the improvement on the line 3 3 of Fig. 2, and Fig. 4 is a sectional rear elevation of the same on the line 4 4 of Fig. 3.

The casing A,on which the music-leaf turner is mounted, is attached to a stand or other suitable support B, and the cover A of the said casing is formed at its rear end with a rack A for supporting a book or sheet-music, the leaves of which are to be turned by the device.

In a suitable bearing arranged on the rear of the casing A is mounted to turn the vertically-disposed solid hub or pivot C of a swing-arm C, disposed horizontally, and on the said hub C is mounted to turn the hub C of a second swing-arm C and on the hub C is mounted the hub C of a third swing-arm C the said hub C being also mounted to turn in a suitable bearing D, fixed to the under side of thecover A of the casing. (See Fig. 3.)

On each of the several swing-arms C, C and C is adjustably held a clamping device E for engaging the bottom portion of a leaf to be turned, as plainly indicated in Fig. 1.

On the hubs C, C and 0 within the casing A are secured gear-wheels F, F, and F located one above the other and in mesh with segmental gear-wheels G, G, and G mounted to swing on a common pivot G carried by the casing A. (See Fig. 3.) The webs of the several segmental gear-wheels G, G, and G are guided between guide-plates H, attached at their ends to posts H and H secured to the bottom of the casing A and forming stops for the said webs to limit the swinging motion of the segmental gear-wheels G, G, and G in either direction.

Each of the segmental gear-wheels G, G, and G is provided at opposite sides of its fulcrum with integral toes G" and G of which the toes G for the segmental gear-wheels G, G, and G are adapted to be successively engaged by the staggered heads of a pawl I, secured to a slide J, mounted to slide transversely in a suitable bearing K, arranged on the casing A, and the toes G of the several segmental gear wheels G, G, and G are adapted to be engaged by the reversibly-staggered heads of a pawl I, secured on a slide J, likewise mounted to slide in the bearing K, independent, however, of the slide J.

The slides J and J are provided with depending integral members J extending through slots in the bottom of the casing A, and the lower ends of the said members J 2 are pivotally connected with the forked ends of levers L and L, provided at their forward ends with knobs or finger-pieces L and L to enable the operator to press the knobs to impart the desired swinging motion to the corresponding lever L or L. Now by pressing the knob L or L aswinging motion is given to the corresponding lever L or L, so as to move the slide J or J from a normal rearward position forwardly, and when the knob is released a spring N or N, pressing on the lever, returns the lever, and with it the slide J or J, to its normal rearmost position. lnstead of pressing the levers L and L by hand, as described, they may be operated by the rearward normal position into a forward position, then one of the heads of the pawl I ongages a corresponding toe G to impart a swinging motion to the corresponding segmental gear-wheel G, G, or G to swing the same from the right to the left in the direction of the arrow at, so as to turn the corresponding gear-wheel F, F, or F and conse quently swing the swing-arm (J, C or C from the right to the left to turn the corresponding leaf over in the same direction. When the lever L is pressed and the slide J is moved from a normal rearmost position to a forward position, then one of the heads of the pawl I engages the corresponding toe to swing the respective segmental gear-wheel G or G from the left to the right in the inverse direetion of the arrow (0 to turn the gear-wheel F, F, or F in a reverse direction, so as to swing the arm C, C, or C from the left to the right to turn a leaf in a similar direction. Thus by the arrangement described a leaf may be turned in either direetion that is, from the right to the left or from the left to the right-in case it is desired to repeat a passage from a previous page or when originally setting the device to turn the leaves over successively from the right to the left.

The book or sheet-music is held at its middle between the members Q and Q of a clamping device Q, preferably supported from the rack A, the member Q being fulcrumed at its lower end on the lower end of the member Q, which in turn is provided at this end. with a downwardly-extending pin Q engaging an opening in the rack A, as plainly indicated in Fig. 3. The two members Q and Q are removably fastened together at the upper end by a suitable sliding head Qt (Indicated in Fig. 2.) By sliding the head Q" forward the member Q can be swung open to allow of conveniently inserting or removing the book or sheet-music between or from the members, it being understood that the head serves to hold the members in a closed position after the book is inserted or removed therefrom.

The operation is as follows: After the book or sheet-music is placed in position on the rack A and clamping device Q then successive leaves are engaged with the clamping devices E of the several arms C, C, and C, and the said arms are swung over to the right by repeatedly pressing the lever L. The several segmental gear-wheels G, G, and G now stand in a right-hand position, with the toe G of the segmental gear-wheel G in engagement with its head of the pawl I and the other heads for the toes G of the segmental gearwheels G and G" out of alinement, so that when the operator presses the lever L and the slide J and pawl I move forward then the head in engagement with the toe G of the segmental gear-wheel G imparts a turning motion to the gear-wheel F to turn the hub C and its arm C to swing the same from the right to the left to turn the first page over. As soon as the operator releases the lever L the latter is returned to its previous position by the spring N, and by the pawl I moving rearward to its normal position the next head of the pawl I engages the toe G for the segmental gear-wheel G, while the toe G for the segmental gear-wheel G is out of engagement with its head on the pawl I, and consequently when the musician has finished the next pages and presses the lever L then a swinging motion is given by the pawl I to the segmental gearwheel G, which turns the gear-wheel F to swing the arm C" from the right to the left and with it the leaf carried by this arm. lVhen the operator releases the lever L and the slide J and pawl I return to a rearmost position, then the top head of the pawl I engages the remaining toe Gr (see Fig. 2) of the top segmental gear-wheel G and when the operator now presses the lever L then this segmental gear-wheel G is caused to swing to turn the gear-wheel F to swing the arm C from the right to the left and with it the last leaf. Whenever it is desired to swing one of the leaves back from the left to the right for repeating a passage of music, then the operator presses the lever L, so that the slide J and pawl I move from a rearmost position forwardly, and the corresponding head of the pawl I engages the corresponding toe G so as to impart a return swinging motion to the respective segmental gear-wheel G, G, or to swing the arm C, (J or C back from the left to the right and with it the corresponding leaf. Thus the operator at will can swing a leaf from the right to the left or swing this leaf back again for repeating a passage of music or for other purposes. The operator instead of manipulating the levers L and L or the pedals P and P can at any time take hold of the leaves and turn the same by hand, especially when it is desired to look over a piece of music before playing, it being understood that the swing-arms and their gears are unlocked in both positions to allow convenient turning over of the leaves by hand.

It-is understood that although I have shown the device provided with but three swingarms and connected gear it is evident that less or more such swing-arms may be employed to turn fewer or more leaves, and hence I do not limit myself to the particular number of swingarms and their operating mechanism described, as the same may be varied.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A music-leaf turner comprising a plu- IIO rality of swing-arms having coinciding axes and means for engaging the leaves to be turned, gear-wheels secured on the hubs of the swingarms, segmental gear-wheels having coinciding axes and in mesh with the said gear-wheels. each segmental gear-wheel being provided with toes on opposite sides of its fulcrum, and manually-controlled pawls, one for engaging the toes located on one side of the segmental gear-wheels and the other pawl for successively engaging the toes on the other side of the segmental gear-wheels.

2. A music-leaf turner comprising a plurality of swingarms having coinciding axes and means for engaging the leaves to be turned, gear-wheels on the hubs of said swing-arms, segmental gear-wheels having coinciding axes and in mesh with the said gear-wheels, each segmental gear-wheel being provided with toes on opposite sides of its fulcrum, manuallycontrolled slides, and pawls moving with the said slides and each having staggered heads, the heads of onevpawl being adapted to successively engage the toes located on one side of the segmental gear-wheels and the staggered heads of the other pawlbeing adapted to successively engage the toes on the other side of the segmental gear-wheels.

3. A music-leaf-turner comprising a plurality of swing-arms having coinciding axes and means for engaging the leaves to be turned,

rection.

gear-wheels on the hubs of said swing-arms, segmental gear-wheels having coinciding axes and in mesh with the said gear-wheels, each segmental gear-wheel being provided with toes on opposite sides of its fulcrum, slides, pawls moving with the said slides and each having staggered heads, the heads of one pawl being adapted to successively engage the toes located on one side of the segmental gear-wheels and the staggered heads on the other pawl being adapted to successively engage the toes on the other side of the segmental gear-wheels, and spring-pressed levers under the controlof the operator and connected with the said slides.

4. A music-leaf turner provided with a swing-arm having means for engaging the leaf to be turned, a gear-wheel secured on the hub.

of the said swing-arm, a segmental gear-wheel in mesh with the said gear-wheel and provided with toes on opposite sides of its fulcrum, and pawls for engaging the said toes, to swing the segmental gear-wheel in either diln testimony whereof I have signed my name to this specification in the presence of two sub. scribing witnesses.

NIELS PIHL JENSEN.

Witnesses:

F. Y. JENSEN, I. J. JAHNsEN. 

